Drive device

Abstract

A drive device alternatively drives a tool disk ( 2 ) of a tool turret ( 4 ) or at least one machining tool fastened to the tool disk ( 2 ) by a retaining unit ( 6 ). Two drives ( 8, 10 ) can be driven by a common drive unit ( 14 ) having a drive shaft ( 12 ). The drives ( 8, 10 ) are connectable to an output ( 22, 20 ) by a coupling unit ( 18 ) that can be controlled by at least one actuating unit ( 16 ). The output is used alternatively to drive the tool disk ( 2 ) or the machining tool. The drive unit ( 14 ) is arranged inside the tool disk ( 2 ) together with the drives ( 8, 10 ).

What is claimed is: 
     
       1. A tool turret, comprising:
 a tool disk; 
 at least one machining tool secured on said tool disk by a retaining unit; and 
 a drive device alternatively driving said tool disk and said machining tool about a tool disk axis and a machining tool axis, respectively, said drive device being located within said tool disk and including
 a common drive unit having a drive shaft, 
 first and second drives driven by said drive shaft and connectable to first and second outputs, respectively, via a coupling unit, and 
 an actuating unit coupled to and actuating said coupling unit to engage and disengage said first and second drives with said first and second outputs, respectively, and 
 alternatively driving said tool disk and said machining tool. 
 
 
     
     
       2. A tool turret according to  claim 1  wherein
 said first drive is located and dynamically connected between said drive unit and said machining tool with a receiving space in said tool disk. 
 
     
     
       3. A tool turret according to  claim 1  wherein
 said actuating unit moves said first drive in an axial direction relative to said drive shaft. 
 
     
     
       4. A tool turret according to  claim 2  wherein
 said second drive is located coaxially relative to said first drive within said receiving space of said tool disk. 
 
     
     
       5. A tool turret according to  claim 1  wherein
 said coupling unit is supported on said drive shaft in a torsionally strong manner and is movable axially relative to said drive shaft. 
 
     
     
       6. A tool turret according to  claim 1  wherein
 said tool disk is pivotable to move said machining tool to and from one machining position therefor when said second drive is engaged with said second output and said first drive is disengaged with said first output by actuation of said coupling unit in a first direction; and 
 the machining tool is driven for machining operations in the one machining position therefor when said first drive is engaged with said first output and said second drive is disengaged with said second output by actuation of said coupling unit in a second direction opposite the first direction. 
 
     
     
       7. A tool turret according to  claim 1  wherein
 said actuating unit comprises a hydraulic cylinder encompassed at least in sections by said drive shaft having an actuated state engaging said first drive with said first output and an unactuated state engaging said second drive with said second output. 
 
     
     
       8. A tool turret according to  claim 1  wherein
 said tool disk is pivotable on a column about a pivot axis; and 
 said drive unit comprises an electric motor with coil windings thereof located on said column and with said drive shaft extending perpendicular to said pivot axis. 
 
     
     
       9. A tool turret according to  claim 8  wherein
 said tool disk is securable in each of preselected pivoting positions relative to said column by a locking unit. 
 
     
     
       10. A tool turret according to  claim 1  wherein
 said drives and said outputs comprise tooth systems that interact respectively with one another in pairs when the respective ones are engaged. 
 
     
     
       11. A tool turret according to  claim 1  wherein
 said second drive drives said tool disk about a column; 
 a Wolfrom planetary gear system is between said second drive and said tool disk transmitting drive energy to said tool disk when said second output is engaged with said second drive by said coupling unit. 
 
     
     
       12. A tool turret according to  claim 1  wherein
 said coupling unit has, at least in sections thereof, a circular cylindrical shape, has said second drive for driving said tool disk on an outer circumference of said coupling unit and has said first drive for driving said machining tool along a center axis of said coupling unit. 
 
     
     
       13. A tool turret according to  claim 1  wherein
 an outer circumferential-side tooth system of said coupling unit meshes with an inner circumferential-side tooth system of a recess of said drive shaft to transfer power from said drive shaft to said coupling unit. 
 
     
     
       14. A tool turret according to  claim 1  wherein
 said Wolfrom planetary gear system comprises a first internal tooth system that is stationary relative to one of a machine-side column or a housing-side column, comprises a second internal tooth system that can turn relative to the one of the machine-side column or the housing-side column jointly with said tool disk and comprises a planet gear meshing with said first and second internal tooth systems. 
 
     
     
       15. A tool turret according to  claim 14  wherein
 rotary motion is transmitted by said second drive and said second output to a first gear engaged to a second gear when said coupling unit is rotated by said drive unit. 
 
     
     
       16. A tool turret according to  claim 15  wherein
 a first gear disk is pivotally mounted on said column and has a circumferential rim gear on a side thereof facing said second gear; and 
 rotary motion of said second gear by engaging said rim gear leads to rotary motion of a second gear disk, said planet gear being pivotally mounted on and rotated by said second gear disk via said internal tooth systems of said Wolfrom planetary gear system. 
 
     
     
       17. A tool turret according to  claim 1  wherein
 said first drive and said first output engage to drive said machining tool when said second drive and said second output are disengaged; and 
 said second drive and said second output are engaged to drive said tool disk to and from one machining position of said machining tool, while said first drive and said first output are disengaged.